| Date | IP Address |
| 2024-03-17 | 193.31.26.68 (ClassC) |
| 2025-01-06 | 104.21.20.157 (ClassC) |
| 2025-01-23 | 104.21.48.1 (ClassC) |
| 2025-05-15 | 104.21.96.1 (ClassC) |
| 2025-06-27 | 104.21.80.1 (ClassC) |
| 2026-01-04 | 172.67.193.45 (ClassC) |
| Date | Domain | IP |
| zmc.return1.at | 2025-01-07 | 172.67.193.45 |
| www.return1.at | 2023-08-29 | 193.31.26.68 |